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2.1 Moon phases

 

Frank L. Preuss

 

Now follows information about moon phases

 

Mondphasen

The crescent moons are so presented in the above picture, as they are seen from the northern hemisphere.

When one sees the moon for the first time again after new moon, then only the right edge of the moon is illuminated and one sees therefore a relative thin crescent moon. This illuminated part of the moon then grows to the full moon and the moon is then waning, until only the left part of the moon is still visible. However, this description is only valid for the observer on the northern hemisphere. The observer on the southern hemisphere experiences something else. With him the illumination starts on the left and ends on the right.

A man stands on the equator and looks westwards. Seen from the north, his nose is on the right; seen from the south his nose is on the left.

A moon orbit lasts about 29.5 days and between the 4 moon phases are about 6 to 9 days each.

 

This is the end of "2.1 Moon phases"
To the German version of this chapter: 2.1 Mondphasesn

 

 

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